In my view, knowing the original locations of such places (if one takes those words as places) is not necessary, as The Quran clearly states in 3:96 "...the first house set-down for mankind..." implying there can be others. What Abraham did is given to us as an example, a blueprint/model, one which the messenger of Quran ultimately brought to fruition in the location he happened to be in.

3) Explain Hudallil Aalameen (03:96)

Means "guidance for the beings". If someone sets up a sanctuary of sorts under God's system, then that place/system/people can act as a guidance for others.